In a significant progress in Kunda killings case, CBI has arrested two brothers who allegedly shot dead Balipur village head over a land dispute triggering violence in which UP DSP Zia-ul-Haq was murdered.

CBI sources said Ajay Pal and Vijay Pal, both sons of Kamta Pal who is also a suspect in master Nanhe Yadav's killing have been nabbed by the agency which is seen as a big leap in solving the case which had brought the law and order machinery of the state government under criticism.